Recovery of oil from bituminous sands
Recovery of oil from bituminous sands
Recovery of oil from shale and the like
Recovery of oil from tar sand
Recovery of oil from tar sands
Recovery of oil from tar sands
Recovery of petalite from ores containing feldspar minerals
Recovery of petroleum from oil-bearing sands
Recovery of petroleum from tar sands
Recovery of platinum-group metals and other metal valuables
Recovery of salvageable components from waste material
Recovery of soluble products from coaly substances
Recovery of suspended materials from gases
Recovery of tar from tar sands
Recovery of useful materials from refuse fuel ash
Recovery of values from rock asphalt, oil shales and like...
Recovery of values from rock asphalt, oil shales and like...
Recreational mining and prospecting device
Rectangular flotation plant
Reducing the water and solids contents of bitumen froth...